<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <style>
        h1 {
            /*color:#ff0000;*/
            /*color:#f00;*/
            /*color:rgb(255,0,0);*/
            color: rgba(255, 0, 0, 0.5);
        }

        #d1 {
            width: 400px;
            height: 400px;
            background-color: pink;
            /*设置背景图片*/
            background-image: url("hua.png");
            /*设置背景图片尺寸*/
            background-size: 50%;
            /*禁止重复*/
            background-repeat: no-repeat;
            /*控制位置: 横向 纵向*/
            /* background-position: 50px 100px;*/
            background-position: 50% 50%;

        }

        #d2 {
            width: 611px;
            height: 376px;
            background-color: #E8E8E8;
            background-image: url("http://doc.canglaoshi.org/tstore_v1/images/itemCat/study_computer_img1.png");
            background-repeat: no-repeat;
            background-position: 90%, 90%;
            background-size: 318px 319px;
        }
    </style>
</head>

<body>
<div id="d1"></div>
<div id="d2"></div>

<h1>颜色测试</h1>
</body>
</html>